meld

AOP for JS with before, around, on, afterReturning, afterThrowing, after advice, and pointcut support

  • meld

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meld
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Aspect Oriented Programming for Javascript. It allows you to change the behavior of, or add behavior to methods and functions (including constructors) non-invasively.
As a simple example, instead of changing code, you can use meld to log the result of myObject.doSomething:
var myObject = {
	doSomething: function(a, b) {
		return a + b;
	}
};

// Call a function after myObject.doSomething returns
var remover = meld.after(myObject, 'doSomething', function(result) {
	console.log('myObject.doSomething returned: ' + result);
});

myObject.doSomething(1, 2); // Logs: "myObject.doSomething returned: 3"

remover.remove();

myObject.doSomething(1, 2); // Nothing logged
Docs
Quick Start

AMD

  1. Get it using one of the following
1. `yeoman install meld`, or
1. `bower install meld`, or
1. `git clone https://github.com/cujojs/meld`, or
1. `git submodule add https://github.com/cujojs/meld`
  1. Configure your loader with a package:
```js
packages: [
	{ name: 'meld', location: 'path/to/meld', main: 'meld' },
	// ... other packages ...
]
```
  1. define(['meld', ...], function(meld, ...) { ... }); or require(['meld', ...], function(meld, ...) { ... });

Node

  1. npm install meld
  2. var meld = require('meld');

RingoJS

  1. ringo-admin install cujojs/meld
  2. var meld = require('meld');
Running the Unit Tests
Install buster.js
npm install -g buster
Run unit tests in Node:
buster test
What's New

1.3.0

  • meld() is now a function that adds aspects.
* **DEPRECATED:** `meld.add()`.  Use `meld()` instead.

1.2.2

  • Remove stray console.log.

1.2.1

  • Fix for IE8-specific issue with meld's internal use of Object.defineProperty.
  • Internally shim Object.create if not available to so that meld no longer requires an Object.create shim to advise constructors in pre-ES5 environments.

1.2.0

* trace: trace method call entry/return/throw
* memoize: simple memoization for methods and functions
* cache: configurable caching aspect to do more than simple memoization

1.1.0

  • Advice can be applied directly to methods on a function.
  • Removed undocumented behavior that implicitly adds constructor prototype advice: to advise a prototype, pass the prototype as the advice target.

1.0.0


See the full Changelog here
References